Cut-off-valve gear



2 Sheets-Sheet 1.y

v (No Model.)

E. C. DICEY.

GUT-OPP VALVE GEAR.

Patented July 14, 1885.`

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2 Sheets-Sheet 2.

A (No Model.)

- E. C. DICEY.

'GUT-UPP VALVE GEAR.

No. 322,264. Patented July 14, 1885.

arena rtree@ ELMER C. DICEY, OF CHICAGO, ILLINOIS.

CUT-OFF-VALVE GEAR.

SPECIFICATION forming part of Letters Patent No. 322,264, dated July 14, 1885.

Application filed April 6, 1885. (No model.) A

To all whom z5 may concern:

Be it known that I, ELMER C. DIcEY, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new.and useful Automatic Cut-Off-Valve Gear for Steam-Engines, of which the following is a specication.

My invention relates to improvements in steam-engine governors or regulators in which the steam is cut off at different points of the stroke, taking steam at full-boiler pressure at the commencement of the stroke, and cutting off at whatever part of the stroke is necessary to maintain a uniform speed of the engine, t 1e point of cut-off being regulated by the ordinary governor-balls in the manner hereinafter described. l attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a vertical elevation, partly in section, of my improved machine. Fig. 2 is an end view of the vibrating arni D and attachments. Fig. 3 is an end view of the disk B.4 Fig. 4 is a vertical cross-section of my improved machine.

Similar letters referto similar parts throughout the several views.

To operate my improved governor, the iiange c is bolted rigidly to an opening in the steam-chest of an engine. rlhe steam-pipe or stop-valve leading from the boiler is bolted to the fiange e. The pin d is attached to the valve-rod by a suitable connection rod or link, so as to give the arm D a vibratory motion corresponding in time to the reciprocating motion of the valve of the engine when the governor-valve opens, giving a free and unobstructed passage for the steam from the boiler to the engine at the commencement of each stroke. Steam being admitted from the boiler enters the governor in the direction indicated by the arrow in Fig. 4, until it vmeets the shell E and is distributed above and below the valve, passing down through the upper and up through the lower disks of the same. The upper disk is made enough larger than the lower' disk to cause the valve to close promptly by the preponderance of pressure on the upper disk on being released in consequence of the wiper d2 having passed clear of the tappet c, allowing it and the pin b to fall back to the central and lowest position. The tappet c is riveted to the rod C and embraced loosely by the slot b in the hollow shaft B, by which motion is communicated to disk B', carrying the pin b,which, in its partial revolution, raises the valve A by pressing upward on the lifter-plate a3. After steam has been admitted to the engine, should the speed increase above that at which the governor is intended to run the balls will rise and lift the rod c and rack c2, causing the` of the engine until the engine is reducedY to its normal speed. rThe angle of the tap- Vpet c causes the steam to be cut off earlier or later in the stroke as the tappet c is moved to or from the wiper d2.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, is-

1. The combination, in a steam-engine governor, of the vibrating yoke D, wiper d2, tappet c, crank-disk B', and lifter-plate c, substantially as described, and for the purpose set forth.

2. The combination, in a steam-engine governor, of the double puppet-valve A, rod a', having rack c2, the spur-gear A, rod C, carrying tappet c, the wiper d, crank-disk B', having pin b, and the lifter-plate as, substantially as shown and described.

ELMER DICEY.

'Witncssesz W. A. MERRIELL, T. J. COOPER. 

